CN1094004C - Discriminating infrared signal detector and systems utilizing the same - Google Patents
Discriminating infrared signal detector and systems utilizing the same Download PDFInfo
- Publication number
- CN1094004C CN1094004C CN96196384A CN96196384A CN1094004C CN 1094004 C CN1094004 C CN 1094004C CN 96196384 A CN96196384 A CN 96196384A CN 96196384 A CN96196384 A CN 96196384A CN 1094004 C CN1094004 C CN 1094004C
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- China
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- mentioned
- receiver
- signal
- communication means
- infrared signal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/60—Receivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optical Communication System (AREA)
- Optical Radar Systems And Details Thereof (AREA)
- Geophysics And Detection Of Objects (AREA)
- Burglar Alarm Systems (AREA)
Abstract
Described is a portable directional receiver ( 2). It comprises a non-visual communicator, a self-contained source of electrical energy, a detector (D1) for receiving a sensed continuous frequency modulated infrared signal, and electronics (Q2, Q3, Q4) converting the sensed signal into intelligible non-visual communication emanating from the communicator both in the presence and in the absence of an ambient background of light energy, such as sunlight. The device is adapted for use by the visually impaired in finding desired locations from which suitable modulated infrared signals are continuously emitted.
Description
Technical field
The present invention relates to the improvement of photoelectron technology, particularly under the environmental background that the luminous energy existence that resembles daylight one class is arranged, be used to detect lightwave signal, especially the improvement of the detector of infrared signal and detection method.
Background
Up to date, the people of blind person, low eyesight person, forfeiture learning ability or printed matter is discerned inconvenient people still abandoned outside the discrepancy and location that in common people's daily life, takes for granted.For them, looking for the road is the thing of a difficulty, and needing usually please stranger's help.No matter be take correct bus, seek lobby or phone, determine the direction of elevator or outlet, by the street or get direction in public places clear, these people all be in unfavorable and dangerous in." pathfinding " equipment that does not have a directivity is to provide the ability of " read and see " sign at a distance to them.
In recent years a kind of information and Pathfinding system have been developed to help blind person, low eyesight person and other inconvenient people of identification printed matter.This system is that trade mark is put on market with " Takling Signs ", comprises infrared transmitter and receiver.Reflector is positioned over key point place in the environment, continues designation of emission information.Receiver is carried by the user, when needs direction or information it is activated.
Under a lot of situations, aforementioned system has in use produced good effect.But when using under the environmental background that the luminous energy existence that resembles daylight one class is being arranged, may run into such as the difficulty that is difficult to maybe may not detect the signal of expectation.Detecting unit must have a kind of method to eliminate the adverse effect of this class background luminous energy like this, so that can both use under the environmental background that has or not the high light existence that resembles daylight one class effectively.
The present invention will realize this demand with a high-efficiency method exactly.
Summary of the invention
In one embodiment of the invention, a kind of portable direction receiver has been proposed, it comprises the communication means (Communicator) (such as loud speaker) of a non-vision, a power supply that carries, a detector that is used to receive the continuous frequency modulation infrared signal of sensing, and the electronic equipment that when having or not environmental background luminous energy to exist, all above-mentioned induced signal can be converted to understandable information (as voice) and send from above-mentioned communication means.Described background luminous energy even can be daylight.
Proposed a system among another embodiment, having comprised:
A) single channel transmitter array, each transmitter are launched a continuous frequency modulation infrared signal, and this signal is wide about 10 ° to 50 a ° cone-shaped beam, and modulating frequency is 25KHz, and bandwidth 6KHz, infrared reference carrier frequency are 850 to 950 nanometers;
B) portable direction receiver, the communication means (as loud speaker) that comprises a non-vision, a power supply that carries, be used to detect, receive above-mentioned continuous frequency modulation infrared signal and be converted to the voice that to understand or other non-vision and first device of understandable exchange way, be used to eliminate the second portion device of the adverse effect of the environmental background luminous energy that comprises daylight by above-mentioned communication means.
Relevant various embodiments of the present invention and characteristic of the present invention will be by following descriptions.Additional claim and accompanying drawing and further become clear.
The accompanying drawing summary
Fig. 1 is the block diagram of the typical fore-end (induction of signal and receiving unit) of receiver of the present invention;
Fig. 2 is used for filtering and detects the signal that receives in the receiver, and suppresses the block diagram of the device of environmental background noise interference;
Fig. 3 is the detailed schematic diagram of fore-end electronic equipment in the typical receiver of the present invention.
Fig. 4 A, 4B and 4C stack up for being used for filtering in the receiver and detecting the signal receive, and suppress the detailed schematic diagram of electronic equipment in the device that environmental background noise disturbs.
The preferred embodiment explanation
Receiver of the present invention especially is fit to use the occasion of single channel transmitter array, each transmitter sends a continuous frequency modulation infrared signal, and this signal is wide about 10 ° to 50 ° cone-shaped beam, and modulating frequency is 25KHz, bandwidth 6KHz, infrared reference carrier frequency are 850 to 950 nanometers.These transmitters can be placed on suitable place, can sense above-mentioned signal so that carry the user visually impaired of receiver, and be brought to the place of thinking by the understandable information that produces in the receiver.
Non-vision communication means in the direction receiver can be all kinds, such as the Morse code casket, and touch braille communication apparatus or other motor conversion equipment.But preferably small-sized audio tweeter or earphone system.When communication means be audio frequency or during the earphone speaker system, conversion of signals the time dependent detector signal photoelectric current for amplify of electronic equipment in the receiver by sensing, and the photoelectric current that amplifies sent to speaker system to drive loud speaker, be that understandable voice send from loud speaker and make the conversion of signals of sensing.
Receiver often comprises one or more baby batteries as self-powered.But also may use the suitable photocell system that is used for luminous energy is converted into electric energy.
Referring now to Fig. 1, received by main PIN detector D1 from single channel transmitter array and the signal that is mixed with ambient background radiation.Auxiliary PIN detector D2 inspection is received ambient background radiation and is used active transducer circuit Q1 to eliminate ambient noise signal from main PIN detector D1.In fact, by main PIN photodiode, the shot-noise current that active transducer and auxiliary PIN photodiode produce is incoherent, the root mean square addition, and be concerned with directly addition from the signal code of auxilliary light of advocating peace by diode.In addition, in a specific scope of design, therefore the steady-state light electric current of auxiliary PIN photodiode can not produce extra shot noise to the not contribution of active transducer electric current in active transducer.Like this, the device among the figure has utilized such circuit structure, and wherein, main PIN photodiode D1 is operated under reverse bias or the photoresistance pattern, and auxiliary PIN photodiode D2 is operated under the photovoltaic mode.Active transducer typically is a plurality of semiconductor devices, as transistor or integrated circuit.Further Signal Regulation and amplification are finished respectively by input unit Q2, grid-the moon output Q3 and impedance transducer Q4.
The output of impedance transducer Q4 is connected to the TRF FM receiver of Fig. 2.The signal that produces is regulated the sound signal of generation demodulation by active bandpass filtering/gain unit U2, amplitude limiter U3 and the kam-frequency circuit (seeing Fig. 4 A) is made up of L2, C19, D2, L3, C23 and D3.The sound signal of demodulation is further regulated (detailed circuit is seen Fig. 4 B) by audio frequency impedance transducer and denoising band pass filter/amplifier circuit Q1.The circuit Q1 of Fig. 2 and Fig. 4 B produces two signals.
First signal that the Q1 of Fig. 2 and Fig. 4 B produces is a denoised signal, is connected to noise shaping/filtering/direct current transducer U4, D4, Q2, D5 and D6 (detailed circuit is seen Fig. 4 B and 4C) through potentiometer R23.Noise shaping/filtering/direct current transducer is to audio frequency output amplifier U5 output denoising level.
Second signal that the Q1 of Fig. 2 and Fig. 4 B produces is connected to level range through potentiometer R32 and selects circuit.Level range selects the output of circuit to be connected to audio frequency output amplifier U5.The output of audio frequency output amplifier U5 is used to drive loud speaker or other non-vision communication means.
About the detailed description of the circuit that relates among Fig. 1 and Fig. 2 is shown in Fig. 3 and Fig. 4 A respectively to 4C.
A characteristic of the present invention is to comprise in the electronic equipment active transducer (being the broadband semiconductor device) that is used for surround lighting induction stable state detector photoelectric current, can remove the environmental background noise of the environmental background luminous energy generation that resembles daylight one class effectively.Thereby this equipment can detect when having the steady-state light electric current to exist the signal near the PW photodiode shot noise limit.According to form shown in the figure, this equipment by with the conversion of signals time change detector flashlight electric currents that amplify more, send to loud speaker and remove to drive loud speaker, and the conversion of signals that will sense from the single channel transmitter array to be understandable voice send from loud speaker realizes this point.
The present invention allows sizable variation in application.Therefore not conduct of description above should not be interpreted as the present invention is confined to restriction with reference to the described specific invention form of accompanying drawing yet.Opposite the present invention expect the scope that relates to by subsequently claim and and other of its equivalence require to propose, these require within the limits permitted by law.
Claims (7)
1. portable direction receiver, comprise a communication means, one self-powered, a detector that is used to detect the continuous frequency modulation infrared signal of sensing, and comprise the active transducer that is used for surround lighting induction stable state detector photoelectric current, a main PIN photodiode and an electronic equipment that is operated in the auxiliary PIN photodiode under the photovoltaic mode that is operated under the photoresistance pattern, this electronic equipment all is that understandable information is sent from above-mentioned communication means with the above-mentioned conversion of signals of sensing under the condition that has or not environmental background luminous energy, and above-mentioned receiver is effective during near the shot noise limit of above-mentioned main PIN photodiode that has the steady-state light electric current at above-mentioned induced signal.
2. according to the receiver of claim 1, wherein communication means be audio frequency or the earphone speaker system, described electronic equipment is by with the time dependent detector signal photoelectric current of above-mentioned conversion of signals for amplifying, and the photoelectric current that will amplify sends to above-mentioned speaker system and makes above-mentioned induced signal be converted to understandable voice with the driving loud speaker to send from above-mentioned loud speaker.
3. according to the receiver of claim 2, wherein said active transducer comprises the broadband semiconductor device.
4. according to the receiver of claim 3, wherein said semiconductor device is included in the integrated circuit.
5. according to the receiver of claim 1, wherein said communication means is a loud speaker.
6. system comprises:
A) single channel transmitter array, each transmitter are launched a continuous frequency modulation infrared signal, and this signal is wide about 10 ° to 50 a ° cone-shaped beam, and modulating frequency is 25KHz, and bandwidth 6KHz, infrared reference carrier frequency are 850 to 950 nanometers;
B) portable direction receiver, it comprises one communication means, one self-powered, be used for detecting, receiving above-mentioned continuous frequency modulation infrared signal and be converted to first device of understandable information to send from above-mentioned communication means, and second device that is used to eliminate the adverse effect of environmental background luminous energy, described second device also comprises the active transducer that is used for surround lighting induction stable state detector photoelectric current, and is operated in the PIN photodiode under the photovoltaic mode.
7. according to the system of claim 6, wherein said first device comprises a PIN photodiode that is operated under the photoresistance pattern, is used to detect and receive above-mentioned continuous frequency modulation infrared signal.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/496,970 US5623358A (en) | 1995-06-30 | 1995-06-30 | Discriminating infrared signal detector and systems utilizing the same |
| US08/496,970 | 1995-06-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1193429A CN1193429A (en) | 1998-09-16 |
| CN1094004C true CN1094004C (en) | 2002-11-06 |
Family
ID=23974932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96196384A Expired - Fee Related CN1094004C (en) | 1995-06-30 | 1996-06-26 | Discriminating infrared signal detector and systems utilizing the same |
Country Status (9)
| Country | Link |
|---|---|
| US (2) | US5623358A (en) |
| EP (1) | EP0872048A4 (en) |
| JP (1) | JP3513763B2 (en) |
| CN (1) | CN1094004C (en) |
| AU (1) | AU706457B2 (en) |
| CA (1) | CA2225714C (en) |
| HK (1) | HK1015985A1 (en) |
| NO (1) | NO976131L (en) |
| WO (1) | WO1997002669A1 (en) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5623358A (en) * | 1995-06-30 | 1997-04-22 | Madey; Julius M. J. | Discriminating infrared signal detector and systems utilizing the same |
| US5986786A (en) * | 1996-11-20 | 1999-11-16 | Talking Signs, Inc. | Passenger conveyance vehicles and systems utilizing the same |
| US5757530A (en) * | 1996-11-20 | 1998-05-26 | Talking Signs, Inc. | Signal transmitter with automatic output control and systems utilizing the same |
| US6400482B1 (en) | 1998-04-15 | 2002-06-04 | Talking Lights, Llc | Communication system |
| US6504633B1 (en) | 1998-04-15 | 2003-01-07 | Talking Lights | Analog and digital electronic receivers for dual-use wireless data networks |
| US6198230B1 (en) | 1998-04-15 | 2001-03-06 | Talking Lights | Dual-use electronic transceiver set for wireless data networks |
| US6069555A (en) * | 1998-05-06 | 2000-05-30 | Skitek; David G. | Facility access system and method with disabled and user assistance |
| AU1119600A (en) * | 1998-10-16 | 2000-05-08 | Talking Signs, Inc. | Modular transmitter system and methods of transmission |
| US6320496B1 (en) | 1999-04-29 | 2001-11-20 | Fuji Xerox Co., Ltd | Systems and methods providing tactile guidance using sensory supplementation |
| US6418372B1 (en) | 1999-12-10 | 2002-07-09 | Siemens Technology-To-Business Center, Llc | Electronic visitor guidance system |
| CA2449563C (en) * | 2001-06-22 | 2011-12-06 | John C. Carrick | System and method for measuring power of optical signals carried over a fiber optic link |
| KR100652666B1 (en) * | 2004-09-01 | 2006-12-06 | 엘지전자 주식회사 | Apparatus and method for sensing obstacle in mobile communication device |
| US20060149415A1 (en) * | 2004-12-10 | 2006-07-06 | Coinstar, Inc. | Systems and methods for collecting vend data from, and exchanging information with, vending machines and other devices |
| US9364755B1 (en) | 2006-05-08 | 2016-06-14 | Nintendo Co., Ltd. | Methods and apparatus for using illumination marks for spatial pointing |
| SG139568A1 (en) * | 2006-07-13 | 2008-02-29 | Avago Technologies General Ip | Remote control receiver device and ambient light photosensor device incoporated into a single composite assembly |
| SG139569A1 (en) * | 2006-07-13 | 2008-02-29 | Avago Technologies General Ip | A composite assembly that incorporate multiple devices that use different wavelengths of light and method for making same |
| SG139570A1 (en) * | 2006-07-13 | 2008-02-29 | Avago Technologies General Ip | A miniature composite assembly that incorporates multiple devices that use different wavelengths of light and a method for making the composite assembly |
| WO2009137363A2 (en) * | 2008-05-05 | 2009-11-12 | Sensimetrics Corporation | Conversation assistant for noisy environments |
| CN106214437B (en) * | 2016-07-22 | 2018-05-29 | 杭州视氪科技有限公司 | A kind of intelligent blind auxiliary eyeglasses |
| CN107390284A (en) * | 2017-07-03 | 2017-11-24 | 厦门科牧智能技术有限公司 | A kind of infrared inductor and method |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE380150B (en) * | 1974-02-18 | 1975-10-27 | Bofors Ab | |
| AT376083B (en) * | 1982-05-19 | 1984-10-10 | Siemens Ag Oesterreich | SUPPRESSION OF ELECTROMAGNETIC INTERFERENCE IN OPTICAL RECEIVERS |
| JPS6081306A (en) * | 1983-10-07 | 1985-05-09 | 日本碍子株式会社 | Working helmet |
| US4977619A (en) * | 1986-10-01 | 1990-12-11 | Crimmins James W | Distributed infrared communication system |
| US4882770A (en) * | 1987-12-14 | 1989-11-21 | H. M. Electronics, Inc. | Wireless optical communication system |
| US5027433A (en) * | 1988-04-04 | 1991-06-25 | Hm Electronics, Inc. | Remote infrared transceiver and method of using same |
| US5253095A (en) * | 1987-12-14 | 1993-10-12 | H. M. Electronics, Inc. | Full duplex communication system and method of using same |
| JP2870791B2 (en) * | 1989-03-20 | 1999-03-17 | ソニー株式会社 | Wireless headphones |
| US5012086A (en) * | 1989-10-04 | 1991-04-30 | Barnard Timothy J | Optoelectronic pickup for stringed instruments |
| US5455702A (en) * | 1993-02-22 | 1995-10-03 | Reed; Clay R. | Light communication apparatus |
| US5495357A (en) * | 1994-02-14 | 1996-02-27 | Machina, Inc. | Apparatus and method for recording, transmitting, receiving and playing sounds |
| US5623358A (en) * | 1995-06-30 | 1997-04-22 | Madey; Julius M. J. | Discriminating infrared signal detector and systems utilizing the same |
-
1995
- 1995-06-30 US US08/496,970 patent/US5623358A/en not_active Expired - Fee Related
-
1996
- 1996-06-26 CN CN96196384A patent/CN1094004C/en not_active Expired - Fee Related
- 1996-06-26 WO PCT/US1996/010900 patent/WO1997002669A1/en not_active Application Discontinuation
- 1996-06-26 CA CA002225714A patent/CA2225714C/en not_active Expired - Fee Related
- 1996-06-26 JP JP50519097A patent/JP3513763B2/en not_active Expired - Fee Related
- 1996-06-26 EP EP96922584A patent/EP0872048A4/en not_active Withdrawn
- 1996-06-26 AU AU63408/96A patent/AU706457B2/en not_active Ceased
- 1996-12-31 US US08/775,138 patent/US5973811A/en not_active Expired - Fee Related
-
1997
- 1997-12-29 NO NO976131A patent/NO976131L/en not_active Application Discontinuation
-
1999
- 1999-03-05 HK HK99100914A patent/HK1015985A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| US5973811A (en) | 1999-10-26 |
| HK1015985A1 (en) | 1999-10-22 |
| CN1193429A (en) | 1998-09-16 |
| EP0872048A4 (en) | 2004-06-16 |
| CA2225714C (en) | 2001-05-29 |
| US5623358A (en) | 1997-04-22 |
| AU6340896A (en) | 1997-02-05 |
| JPH11501482A (en) | 1999-02-02 |
| WO1997002669A1 (en) | 1997-01-23 |
| CA2225714A1 (en) | 1997-01-23 |
| EP0872048A1 (en) | 1998-10-21 |
| AU706457B2 (en) | 1999-06-17 |
| NO976131L (en) | 1998-02-27 |
| JP3513763B2 (en) | 2004-03-31 |
| NO976131D0 (en) | 1997-12-29 |
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